The GA-101 adaptor cable allows you to connect two instruments, such as a guitar or bass, into one 1/4" phone jack input on your instrument amplifier. This adapter will work with passive or active pickups found in most guitars as well as basses. Simply plug in your instruments and balance the volume using the normal volume controls on your instrument. The special (patent pending) design will combine the signals without the problems found using a typical Y-cable. This keeps interaction between the two instruments at an unnoticeable minimum and adjusts the volume to match what you would find with a typical single instrument.

Amazingly, this can be an inexpensive, lightweight alternative to a 2-to-1 / 1-to-2 selector box. Works as described. I compared this side-by-side to a standard Y-cable and it regulated the volume of the two instruments very well (the Y-cable was awful, this cable was good).

I use this product on my practice amp.I can plug in my acoustic electric and bass at the same time..I have even pluged in a mic to sing and jam from same amp with no problem..There is no feedback or hum..I plan to buy another one...Theres lots of uses for this product...